Oiler for commutators



(No Model.)

" T. E. CRAIG.

OILER FOR OOMMUTATORS. No. 393,422. Patented Nov. 27,1888.

0715220 r rz/qy,

UNITED STATES PATENT Tr nce.

THOMAS E. CRAIG, OF AKRON, OHIO.

OILER FOR COMMUTATORS.

SPECIFICATION forming part of Letters Patent No. 393 1-22, dated November 27, 1888.

Application filed August 20, 1558. SerialXoiSfLlfiD. (Xe model.)

f0 all whom it may concern.-

Be it known that I, THOMAS E. CRAIG, a citizen ofthe United States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Oiler and Wiper for Coininutators, of which the following is a specification.

The object of my invention is to provide an appliance adapted to be attached to a dynamoelectric machine, which shall rest upon and follow any inequalities of the comi'nutator, constantly wipe the same, and apply to it a sufficient lubricant to prevent cutting between it and the brushes.

My invention consists in the devices illus trated in the accompanying drawings, as hereinafter described and claimed.

In the accompanying drawings, in which similar letters of reference indicate like parts in the different figures, Figure l is a side elo vation of my improved wiper and oiler, with commutators, indicated in outline to show their relative position; Fig. 2, a plan of the same; and Fig. I) a crosssection of the wiping and oiling roller, enlarged, showing its construction.

Upon the commutator-s C, which are shown as simple cylinders, as the machine is confined to no particular form or construction, rest the rollers R R, hereinafter more fully described, mounted on wiresor small rods 1 1', each re turned about the ends and side of the roll and twisted to form a shank or arm, which is hinged at its other end to the under face of the block B farthest from therolls. The block B is supported on a spindle or shaft, D,which is attached to any convenient part of the dynamo-frame, and is retained thereon and held at any angle by a nut, (Z. Hence, by turning the block B forward on the spindle D, its front lower edge will press on the arms that support the rolls It t and press the latter against the commutators 0. As these arms are, how ever, often of different degrees of straightness and strength, I provide in the block I two thumbscrews, T, whose lower ends rest on insulatingplatesl on the arms, and whereby I am enabled to regulate the pressure of the block B on each. The rollers R are preferably constructed of an inner core, 0, of metal surrounded by a sleeve, 8, of elastic material, as rubber or soft wood, the core and sleeve being covered and lined, respectively, with a porous material. ab, as leather, adapted to absorb and give off a lubricant, as oil. By this construction the rollers are prevented from heating on their axles, and the outer covering, a, gives off gradually sufficient oil to prevent cutting of the commutator and brushes, but not enough to insulate the former.

I claim- 1. In a wiper and oiler for commutators', the combination of two rollers, covered with an absorbent material, which rest on the commutators, each journaled at the end of an arm, said arms being hinged to a pivoted block at tached to the dynamo-frame, substantially as shown, and for the purpose specified.

2. In a wiper and oiler for commutators, the combination, wit-h the block B, supported on the spindle D and provided with thumb screws T, and plates I, of the arms 0' and rollers It, all constructed and arranged shown, and for the purpose specified.

8. In a wiper and oiler for commutators, the combination of a supporting-block attached to the dynamo frame, and supporting arms hinged thereto, of rollers journaled in said arms and consisting of a core, 0, sleeve 8, and porous cover a, and lining I), all constructed and arranged substantially as shown, and for the purpose specified.

In testimony that I claim the above I hereunto set my hand.

THOMAS E. CRAIG.

In presence of O. P. HUMPHREY, F. H. STUART. 

